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BU1840AMUV-E 数据表(PDF) 3 Page - Rohm |
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BU1840AMUV-E 数据表(HTML) 3 Page - Rohm |
3 / 17 page Datasheet Datasheet . 3/14 BU1840AMUV TSZ02201-0Q1Q0AJ00130-1-2 © 2012 ROHM Co., Ltd. All rights reserved. 2.AUG.2012 Rev.001 TSZ22111・15・001 www.rohm.com ● Electrical characteristics (Unless otherwise specified: Ta=25℃, VIO=1.8V) Item Symbol Min. Typ. Max. Unit Conditions 【 I 2C input (SDA, SCL)】 L level input voltage VIL1 -0.3 - 0.25 × VIO V H level input voltage VIH1 0.75 × VIO - VIO +0.3 V Hysteresis width Vhys1 0.05 × VIO - - V L level output voltage (Sink current = 3mA) VOL1 0 - 0.3 V SDA pin Input current Iin1 -3 - 3 μ A Pin voltage=0~VIO ● I 2C BUS format The writing/reading operation is based on the I 2C slave standard. ・ Slave address A7 A6 A5 A4 A3 A2 A1 R/W 1 1 1 0 0 0 1 1/0 ・ Bit Transfer SCL transfers 1-bit data during H. SCL cannot change signal of SDA during H at the time of bit transfer. If SDA changes while SCL is H, START conditions or STOP conditions will occur and it will be interpreted as a control signal. ・ START and STOP condition When SDA and SCL are H, data is not transferred on the I 2C- bus. This condition indicates, if SDA changes from H to L while SCL has been H, it will become START (S) conditions, and an access start, if SDA changes from L to H while SCL has been H, it will become STOP (P) conditions and an access end. ・ Acknowledge It transfers data 8 bits each after the occurrence of START condition. A transmitter opens SDA after transfer 8bits data, and a receiver returns the acknowledge signal by setting SDA to L. ・ Protocol SDA SCL SDA a state of stability: Data are effective SDA It can change SDA SCL SP START condition STOP condition 12 89 DATA OUTPUT BY TRANSMITTER DATA OUTPUT BY RECEIVER acknowledge not acknowledge S START condition clock pulse for acknowledgement SCL A A S P The mastering side is a transmitter. The slave side is a receiver. The slave side is a transmitter. The mastering side is a receiver. Unacknowledged Acknowledge Stop condition Start condition Sr Repetition start condition Legend |
类似零件编号 - BU1840AMUV-E |
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类似说明 - BU1840AMUV-E |
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